I'm a newcomer to IntelliJ and I've been using it to develop a Spring Boot application. Right now, my project structure looks like this:
https://i.sstatic.net/7A7jb.png
My goal is to set up a "css" directory within the "static" directory under the "resources" section so that I can store CSS files for my Thymeleaf web page templates.
However, when I attempted to create a "css" sub-directory by right-clicking on the "static" folder and selecting New -> Directory, the result was renaming the "static" folder to "static.css" instead of adding a new sub-directory as intended, shown in the image below:
https://i.sstatic.net/DRGa9.png
The presence of dots on the folder icons almost gives the impression that IntelliJ is treating these folders as Java packages rather than regular file directories. What is the correct procedure with IntelliJ to successfully create a sub-directory under the "static" folder?